A software patch, SiSUSBrg.exe is used to fix a USB controller issue for SiS USB controllers in Windows XP. The issue was addressed in subsequent versions of SiS software and additionally is not necessary for all future versions of Windows. Founded in 1987, SiS is a Taiwanese corporation that focuses on motherboard chipsets and a variety of peripherals.
If you want a detailed security rating about your SiSUSBrg.exe (and all other running background processes) read the following user opinions, and download the free trial version of Security Task Manager.

Note: Any malware can be named anything - so you should check where the files of the running processes are located on your disk.
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Users Opinions

Average user rating of SiSUSBrg.exe:
based on 22 votes. Read also the 15 reviews.

320 users ask for this file.
18 users rated it as not dangerous.
One user rated it as neutral.
One user rated it as little bit dangerous.
2 users rated it as dangerous.
2 users didn't rate it ("don't know").

Installed with the SIS chipset drivers. Not dangerous, never attempts to send info over internet. Still you may want to remove it from startup and check that all your USB device still function correctly.

this file was causing a pc lots of troubles, it slowed the machine down as hell, almost made it impossible to keep working with the machine

sisusb.brg is not a virus or trojan, sometimes on laptop computers a usb port does not shut oof and discharges the battery, this file is supposed to correct this problem. Do not use it if you battery does not die when your laptop is swithed off as in my case it caused the discharge of the battery in off mode in three days. Ray Wilson

USB controller on WinXP. Nasko

I think it might do something, my PC has been slowed down recently due to a new HD put in and this could be related I believe... any info on this pls email me at wf07@homosexual.net WF07

SISUSBrg will attempt to change a protected regisrty key when the system restarts from a crash. Komodo's Defender+ will flag this. It doesn't seem to matter if you allow or block this activity. THe system will reboot and run normally. Gordon

SiS USB Patch. Installed with SiS Chipset on XP. Not specific to Acer but related to SiS BaseBoards. Informatics NZ

It's a SIS USB driver patch. Don't worry about it.

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More process information

Is SiSUSBrg.exe spyware or a virus, trojans, adware or worm? Is there a known SiSUSBrg.exe error?